A continuous record that was finally cut off yesterday. .. It's important to continue, but it's not good to stop, so I regained my mind and restarted.
-A command to display the line containing "character string (pattern)" in the file. -Multiple files and directories can be specified as search targets. -If no file is specified, read from standard input
-C: Display only the number of matching lines -V: Display only the number of unmatched lines -N: Display the matched line with a line number at the beginning -F: Read a file from the search pattern -I: Case insensitive -E: Same as egrep (extended regular expression) ・ -F: Same as fgrep (search pattern eo fixed character string)
that's all.
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